- Exclusively for Dura-Ace 7970/7971-Di2 electronic shifting systems (average weight for rear wiring with battery cradle = 120g)
- Rear kit refers to wiring needed from stem/bar junction to battery cradle and front/rear derailleurs. Includes a black, downtube wire cover/channel (also available as extra or in white or grey for better color matching)
- Battery cradle included with rear wire harness but battery sold separately (along with separate charger and power cord)
- Frame sizing for rear wire kits: most 53-59cm frames will utilize a medium kit. Frame must also have a threaded hole in the bottom bracket shell for mounting
- Direct mount (battery cradle) or internal routing kits require frames specifically designed for the application (check with frame manufacturer)
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